Justification:
Listed as Least Concern in view of its wide distribution, presumed large population, and because it is unlikely to be declining fast enough to qualify for listing in a more threatened category.

The species' range extends from western, central, and southern Arizona, central and southern New Mexico, and southwestern and central Texas in the United States, south through Mexico to the southern edge of the Mexican Plateau and Mesa del Sur (Oaxaca), including Isla Tiburon in the Gulf of California, at elevations from near sea level up to around 2,930 m asl (9,600 feet) (Grismer 2002, Stebbins 2003, Campbell and Lamar 2004).

This species is represented by a large number of occurrences (subpopulations). On a range-wide scale, Campbell and Lamar (2004) mapped more than 200 collection sites. The adult population size is unknown but presumably exceeds 100,000. It is common in Mexico and in some areas of the United States. Its extent of occurrence, area of occupancy, number of subpopulations, and population size are probably relatively stable or declining at less than 10% over 10 years or three generations.